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You can use the un-used side of your Topping LA90 binding post. You can test the audio from the un-used side to make sure it has signal before you connect with your REL.
You can use the un-used side of your Topping LA90 binding post. You can test the audio from the un-used side to make sure it has signal before you connect with your REL.
Ok, I got the model wrong. If you are using spade for your speaker, you can get spade connector for REL. You can try unscrew the binding post to the maxi and see you can accommodate two spade. If you are using banana, your REL need to accommodate addition banana for your speaker. This will increase the back space of the amp. The easiest way is to used REL bare wire and wrap around the binding post if you are comfortable with exposed wire.
I'm also researching LA90 with REL HC wiring. LA90(d) is class-AB so in stereo mode just connect the red and yellow wire to positives and black to negative as usual.
What's concerning is connecting 2 REL subs to 2 LA90s in mono mode. REL recommend connecting black wire to chassis or use LFE as ground reference (https://relsupport.zendesk.com/hc/en-us/articles/115004486647-Monoblocks-2-RELs-Connection-Method), but I would prefer to connect black wire to the unused negatives (L negative/R negative, shorted together in mono mode) binding post as they (correct me if I'm wrong) still represent ground.
Anyone tried this before?